To keep it from looking obvious, Su Er also awarded some points to the other three houses before the lesson ended.
That included Slytherin, but if anyone interested had tallied them up...
Gryffindor had gained a full sixty points in this lesson, Hufflepuff thirty, and Ravenclaw thirty as well. Slytherin, however, had received a mere fifteen. They had originally had thirty, but the problem lay in the duel between Draco Malfoy and Harry Potter.
As an outstanding member of the Defence Against Dark Magic group, Harry was naturally no ordinary talent. What went unmentioned was that, in the timeline without Su Er, he had led a group of young wizards in studying Defence Against Dark Magic and had mastered the Shield Charm very early on.
In this timeline, with Su Er's guidance and effective training, he had likewise mastered the technique of casting the Shield Charm silently.
Malfoy kept failing to embarrass Harry with a jinx. As time passed, he finally flew into a humiliated rage and used a curse, openly breaking the rules Su Er had laid down for the game.
Needless to say, Su Er happily penalized Malfoy fifteen points.
Su Er did not care in the slightest about this little Death Eater. He was still green. Even if he had dared to face Dumbledore and use the Killing Curse on him in the original timeline, one must not forget that he had been forced into it by Voldemort, rather than acting entirely of his own free will.
Su Er took a broader view. Getting petty with a child was not something an adult ought to do.
Oh, just let him and Harry carry on with their love-hate relationship.
Having lost fifteen points without managing to embarrass Harry, the still very immature young master Swagger stormed off after